whopper

1. (informal) Something remarkably large.Examples: "I’d gone out pike fishing, bless you, never thinking of a trout, and when I saw that whopper on the end of my line, blest if it didn’t quite take me aback. Well, you see, he weighed twenty-six pound."; "I’ve just run down from Ulster County to look at the town, bein’ that the hayin’s over with. Gosh! but it’s a whopper. I thought Poughkeepsie was some punkins; but this here town is five times as big."; "There's a storm blowing up, Sylvester—a 'whopper', speaking in the vernacular of the peasantry."informal

2. (informal) An outrageous or blatant lie.Examples: "When he got done telling it there was one of them uncomfortable silences that comes, you know, when a person has been telling a whopper and you feel sorry for him and wish you could think of some way to change the subject and let him down easy, […]"; "Coming out with a whopper now. Rhapsodies about damn all. Believes his own lies. Does really. Wonderful liar. But want a good memory."; "Isuzu Inc. hit pay dirt in the late '80s with its series of “Joe Isuzu” spots, featuring an oily, Satanic-looking salesman who told whoppers about Isuzu's genuine llama-skin upholstery and ability to run on tapwater."informal